If you know the difference between classic and flash costumes you can just tell by looking. The major difference between the 2 is that classic shows a lot more skin while flash covers up a lot more. And you are right-just looked at the picture and the costumes are from the DP ovas that were addons to the original tv series, modified in color and details, ie, collars are closed at the top, different colors for Yuri and Kei. GOTTA LOVE THE DIRTY PAIR!!
I love anime-but I still have a life-but not by choice......?